Research On Radiation Effect Of MnZn Ferrite Film And Particle

With the development of aerospace and nuclear technology,researchers in various countries have begun to study the influence of radiation particles on materials.Modern electronic components are very sensitive to the radiation space environment.All kinds of radiation particles may cause observable radiation effects,and as the complexity of modern equipment increases,their response to radiation seems to be diversified,and a variety of new failure modes are often observed.MnZn ferrite materials are widely used in various industries due to their excellent magnetic properties.To study the radiation effect of MnZn ferrite,the effect of the radiation particles on the material is of great significance for the related devices used in the radiation environment.First of all,MnZn ferrite thin films were prepared by RF magnetron sputtering.The effects of preparation process and annealing methods on the properties of the films were studied.The results show that the film has high quality under the condition of sputtering power of 120 W,sputtering gas pressure of 0.7Pa and substrate temperature of 250°C.The saturation magnetization reaches 264.3kA/m.After annealing at 550 °C at atmospheric pressure,the magnetic properties of the film samples decreased.After vacuum annealing at 550°C,the performance of the film sample was improved,the saturation magnetization was increased to 293.3 kA/m,and the coercive force and surface roughness were also decreased.Therefore,it is not advisable to use atmospheric pressure annealing method for the film samples.Next,MnZn ferrite particles were prepared by solvothermal method.The results show that MnZn ferrite particles synthesized in the mixed solvent system of ethylene glycol and diethylene glycol were regular spherical with good dispersibility and uniform particle size distribution.The average grain size was about 17.6 nm and the saturation magnetization was 80.1emu/g,and the coercive force was 63.5Oe.Finally,the radiation effects of electron radiation and gamma radiation on Mn-Zn ferrite thin film materials and particle materials were studied.The result of electron radiation experiments show that the magnetic properties of thin film materials and particle materials will decrease after being irradiated by electrons,and the magnetic properties will decrease with the increase of radiation dose.After 8MGy dose of electron irradiation,the saturation magnetization of the film sample decreased from 324.0 kA/m to 264.4 kA/m,and the particle sample decreased from 80.6 emu/g to 66.5 emu/g.The RMS of the film sample increased from 2.08 nm to 5.62 nm after irradiation.The experimental results of gamma radiation show that the saturation magnetization of the thin film samples decreased from 299.8 kA/m to 254.8 kA/m,and the particle samples decreased from 80.6emu/g to 68.2emu/g after the dose of 8kGy.The RMS of the film samples increased from 2.08 nm to 2.56 nm after irradiation.